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SYN attack is a kind of DOS attack. It takes advantage of TCP protocol defects and consumes CPU and memory resources by sending a large number of semi-connection requests. SYN attacks can not only affect hosts, but also harm network systems such as routers and firewalls. In fact, SYN attacks can be implemented as long as these systems turn on TCP services no matter what systems are targeted. As can be seen from the above figure, the server receives the connection request (syn=j), adds this information to the unconnected queue, and sends the request packet to the client (syn=k, ack=j+1), then enters the SYN_RECV state. When the server does not receive an acknowledgement packet from the client, it retransmits the request packet and does not delete this entry from the non-connection queue until the timeout. With IP spoofing, SYN attacks can achieve good results, Typically, clients forge a large number of non-existent IP addresses in a short period of time, SYN packets are continuously sent to the server, and the server replies to the confirmation packets and waits for the confirmation of the customer. Since the source address does not exist, the server needs to continuously resend until it timeout. These forged SYN packets will occupy the unconnected queue for a long time, normal SYN requests will be discarded, the target system will run slowly, and in serious cases, the network will be blocked or even the system will be paralyzed.讲述了天帝为维系三界太平，派杨戬携哮天犬与太白星君前去摧毁玄天罗晶，却反遭红魔地煞打击，哮天犬因此被剔骨成魔，杨戬带太白星君逃离魔界。时隔千年，玄天罗晶终将出世，负罪前行的杨戬又一次奉命前往地脉，却意外遇到已经失去记忆的哮天犬，昔日兄弟反目成仇。杨戬为救回哮天犬，与太白星君以及凡管处降妖猎手趣儿潜入魔界，魔界处处险境，几人能否救出哮天犬，又能否唤醒哮天犬的记忆？这么一愣神，胡钧的剑已经递到了她的胸口，眼看就要穿过七巧玲珑心。根据刑警队侦察员洛军提供的信息，西海市刑警队对钱海洋犯罪集团即将进行的假抄交易撒下了天罗地网。在交易现场，一个陌生人的出现使刑警队长素长峰感到疑惑，更使钱海洋警觉，钱海洋取消了交易。面对突然的变局，素长峰当机立断对海上的可疑渔船进行检查，并对钱海洋的临时指挥场所进行搜查，但一切都无功而返。嗅觉灵敏的钱海洋在内部进行排查和清洗，他宁可错杀，决不放过，我们的卧底侦察员洛军同志牺牲了。素长峰痛定思痛，决心将案子追查到底。那个搅乱交易现场的陌生人，拐着腿，肩扛煤气罐，手拿打火机，扬言要炸夜总会—他名叫戚兵，是名还没有跨进刑警队大门工作的侦查员。那次“搅局”是他初到西海市，在路上意外碰到卖假币的混混，他本想携带“礼物”来公安局报到，结果他误闯交易现场，自己的腿也被我武警打伤。事后的戚兵彻底反省，将计就计，决心完成洛军未完成的使命。戚兵高度的自责和刑警的职业使命感，使他在局长和素长风的周密安排下，开始了他的卧底序幕——戚兵化名刘大兵，扛着煤气罐冲入钱海洋他们为刚放出来的罗子军准备的洗尘宴。他要向罗子当日送他来时，下官也曾说过，若张家确认他不是玉米，就将他还给下官。本剧讲述了上班族宝田多家良（千叶雄大饰）在机缘巧合之下，观看了剧团英雄的公演，并被演员鸭岛友仁（永山绚斗饰）的表演所打动，辞去工作开启了自己的演员生涯的故事。两人由此开始了同居生活。友仁在教给多家良表演基础的同时，也对他寄予希望，并以此激励自己继续在演员道路上前进。在友仁的帮助和支持下，多家良的才能得到世间认可，成功转变为知名演员。但这时，两人的关系却发生了微妙的变化。